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REVENUE AND CONTRACT LIABILITIES (Tables)
 12 Months Ended
Sep. 28, 2019
Revenue from Contract with Customer [Abstract]  
Changes in contract liability balances
The following table shows the changes in contract liability balances during the fiscal year ended September 28, 2019:
 
 
Fiscal
(in thousands)
 
2019
Contract liabilities, beginning of period
 
$
997

Revenue recognized
 
(7,935
)
Additions
 
8,834

Contract liabilities, end of period
 
$
1,896